Buffer-brake for motor-driven sewing-machines.



H. L. PITMAN.

BUFFER BRAKE FOR MOTOR DRIVEN SEWING MACHINES.

APPLIUA'L'ION FILED APR.4, 1912.

1,959,690, Patented Eab.11,1913.

noses.

I HENRY L. PITMAN, F PINEVILLE, KENTUCKY.

BUFFER-BRAKE FOR MOTOR-DRIVEN SEWING-MACHINES.

To all whom it may concern."

Be it known that I, HENRY L. PITMAN, a

citizen of the United States, residing at Pineville, in the county of Bell and State of Kentucky, have invented certain new and useful Improvements in Buffer-Brakes for Motor-Driven Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use .the same, reference being had to the accompanyin drawings, and to the letters and figures 0 reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in buffer brake mechanism, especially adapted for use in connection with. sewing machines and the object in view is to produce a simple and eficient means whereb the operator of the machine may cause the speed of the machine to be slackened by simply pressin down upon a resilient' rod positioned un erneath the hand of the operator as itwould naturally rest while holding the work to the machine.

The invention consists of a simple and eflicient device of this character which is illustrated in the accompanying drawings, in which i Figure l is a perspective view showing the application of the invention to a sewing machlne, and Fig. 2 is a detail perspective view of the brake removed from the machine.

Reference now being had to the details of the drawings by letter, A designates the machine table and B the machine of the usual construction and C the usual hand or fly wheel.

- A rod, designated by letter D, is journaled in a suitable bearing E and has one end upwardly bent and curved, formin an arm F with a buffer brake G secure thereto which, as the shaft D is rocked, is adapted Specification of Letters Patent.

Application filed April 4, 1912. Serial No. 688,405.

Patented )Felo. it, 1913.

to be thrown frictionally against the wheel C. Said rod is preferably of {a resilient material and is curved as at H and one end is pivotally mounted in a bearing K. It will be noted upon reference to Fig. 1 that the curved part of said rodv is upwardly bowed and positioned so that the hand of the.

operator sitting at the machine will naturally rest upon the rod and, when it is desired to slacken the speed of the machine for any purpose, a slight pressure of the wrist or hand of the operator normally resting upon the rod, may cause the arm F to swing laterally under the bufier brake applied to the fly wheel, thus checking the speed of the machine and, at the same time, the opera tors hands are at liberty to manipulate the work being operated upon. When pressure is relieved from the bowed portion H of the rod, the latter returns to its normal position and the bufier brake is thrown from contact with the fly wheel.

By the provision of a device as shown and described, it will be observed that an efiicient means is afiorded for regulating the speed of a machine without the operator havin to stop and remove one hand from the worl to grasp the wheel for any purpose as is customary with machines of the usual construction."

, What I claim to be new is In combination with a sewing machine table, a fly wheel, a rock shaft and bearings in which the same is journaled, said rock shaft having a resilient bowed portion, a brake upon the shaft, said shaft adapted to rock in its bearings as the bowed portion is flexed by pressure being applied thereto, as set 

